Subwoofers down-firing or side-firing? Why?


Just added down-firing subs (Omega 10", sealed) to my Omega single driver speakers. I could ask Louis, but why do you think he designed them to be down-firing?  My prior REL and Rhythmiks were side-firing (used with very different systems). 
redwoodaudio
There are so many variables involved, seems like whether driver faces down or sideways is not the major factor... 
In my case (Martin Logan), I did not notice any sound difference so I opted for safety and I use them down firing to reduce any cleaning and/or small children accidents which may happen and destroy the woofer.
I own 2 RELs from a similar era, a Q108MKII down firing 8", and a Q150e front firing 10". They are GREAT subs and work swimmingly together. Bought used at different times for about 200 bucks each...make my own cables out of Canare quad.
I've tried both configurations with the exact same subwoofer.  With downfire, you do hear the bass, but you don't get nearly as much "punch you in the chest" type of sonic impact.